<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <style type="text/css">
        pre {
            font-family: monospace;
            display: block;
            white-space: pre;
            font-size: 2em;
        }
    </style>
</head>
<body>
    <script type="text/javascript">
        if (!Math.imul) Math.imul = function(a,b) {return (a*b)|0;}/* function(a, b) {
          var aHi = (a >>> 16) & 0xffff;
          var aLo = a & 0xffff;
          var bHi = (b >>> 16) & 0xffff;
          var bLo = b & 0xffff;
          // the shift by 0 fixes the sign on the high part
          // the final |0 converts the unsigned value into a signed value
          return ((aLo * bLo) + (((aHi * bLo + aLo * bHi) << 16) >>> 0) | 0);
        };*/

        if (!Math.clz32) Math.clz32 = (function(log, LN2){
          return function(x) {
            // Let n be ToUint32(x).
            // Let p be the number of leading zero bits in 
            // the 32-bit binary representation of n.
            // Return p.
            var asUint = x >>> 0;
            if (asUint === 0) {
              return 32;
            }
            return 31 - (log(asUint) / LN2 | 0) |0; // the "| 0" acts like math.floor
          };
        })(Math.log, Math.LN2);
    </script>
    <script src="https://cdn.jsdelivr.net/npm/promise-polyfill@8/dist/polyfill.min.js"></script>
    <script type="text/javascript" src="../lib/olm/olm_legacy.js"></script>
    <script type="text/javascript">
        function doit(log) {           
                var alice = new Olm.Account();
                alice.create();
                log("alice", alice.identity_keys());

                var bob = new Olm.Account();
                bob.unpickle("secret", "EWfA87or4GgQ+wqVkyuFiW9gUk3FI6QSXgp8E2dS5RFLvXgy4oFvxwQ1gVnbMkdJz2Hy9ex9UmJ/ZyuRU0aRt0IwXpw/SUNq4IQeVJ7J/miXW7rV4Ep+4RSEf945KbDrokDCS2CoL5PIfv/NYyey32gA0hMi8wWIfIlOxFBV4SBJYSC+Qd54VjprwCg0Sn9vjQouKVrM/+5jzsv9+JK5OpWW0Vrb3qrXwyAOEAQ4WlOQcqZHAyPQIw");
                log("bob", bob.identity_keys());
                // generate OTK on receiver side
                bob.generate_one_time_keys(1);
                var bobOneTimeKeys = JSON.parse(bob.one_time_keys());
                var otkName = Object.getOwnPropertyNames(bobOneTimeKeys.curve25519)[0];
                var bobOneTimeKey = bobOneTimeKeys.curve25519[otkName];
                // encrypt
                var aliceSession = new Olm.Session();
                aliceSession.create_outbound(
                    alice,
                    JSON.parse(bob.identity_keys()).curve25519,
                    bobOneTimeKey
                );
                log("alice outbound session created");
                var aliceSessionPickled = aliceSession.pickle("secret");
                log("aliceSession pickled", aliceSessionPickled);
                try {
                    var tmp = new Olm.Session();
                    tmp.unpickle("secret", aliceSessionPickled);
                    log("aliceSession unpickled");
                } finally {
                    tmp.free();
                }
                var message = aliceSession.encrypt("hello secret world");
                log("message", message);
                // decrypt
                var bobSession = new Olm.Session();
                bobSession.create_inbound(bob, message.body);
                var plaintext = bobSession.decrypt(message.type, message.body);
                log("plaintext", plaintext);
                // remove Bob's OTK as it was used to start an olm session
                log("bob OTK before removing", bob.one_time_keys());
                bob.remove_one_time_keys(bobSession);
                log("bob OTK after removing", bob.one_time_keys());
        }

        if (window.msCrypto && !window.crypto) {
            window.crypto = window.msCrypto;
        }

        function doRun(e) {
            e.target.setAttribute("disabled", "disabled");
            var logEl = document.getElementById("log");
            logEl.innerText = "";
            var startTime = performance.now();
            function log() {
                var timeDiff = Math.round(performance.now() - startTime).toString();
                while (timeDiff.length < 5) {
                    timeDiff = "0" + timeDiff;
                }
                logEl.appendChild(document.createTextNode(timeDiff + " "));
                for (var i = 0; i <  arguments.length; i += 1) {
                    var value = arguments[i];
                    if (typeof value !== "string") {
                        value = JSON.stringify(value);
                    }
                    logEl.appendChild(document.createTextNode(value + " "));
                }
                logEl.appendChild(document.createTextNode("\n"));
            }
            doit(log);
            e.target.removeAttribute("disabled");
        }

        function main() {
             Olm.init(   ).then(function() {
                var startButton = document.getElementById("start");
                startButton.innerText = "Start";
                startButton.addEventListener("click", doRun);
            });
        }
        document.addEventListener("DOMContentLoaded", main);
    </script>
    <pre id="log"></pre>
    <button id="start">Loading...</button>
</body>
</html>
 
